Thinking it came from the hub, I plugged it into my laptop through the powered hub. Unfortunately, the behavior is not reproducible even with intensive read/write access. I also tried unplugging the hub when it was connected to the laptop to make sure the USB power from the laptop didn't automatically take over. Basically, I am pretty certain that the problem isn't coming from the hub.

2 Answers
2

There are quite a few posts raising pretty much the same issues as yours I believe. Here are a couple. Most advice that you make 100% sure your power supply suffices RPI and the HDD needs. Not only your HDD needs to be supplied enough power but the RPI, too.

Disconnect everything from the RPI, leaving just the network and the HDD and see how this helps.

I don't know what your hub make/model is, but mine has two ports that provide 1.2A each whilst rest of the ports on it only do 500mA and will require a Y-cable to connect to HDD. Check into that to see if that helps.